# Coverage for pygeodesy/named.py : 96%

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1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 | # -*- coding: utf-8 -*- u'''(INTERNAL) Nameable class instances. Classes C{_Named}, C{_NamedDict}, C{_NamedEnum}, C{_NamedEnumItem} and C{_NamedTuple} and several subclasses thereof, all with nameable instances. The items in a C{_NamedDict} are accessable as attributes and the items in a C{_NamedTuple} are named to be accessable as attributes, similar to standard Python C{namedtuple}s. @see: Module L{pygeodesy.namedTuples} for (most of) the C{Named-Tuples}. ''' from pygeodesy.basics import isclass, isidentifier, iskeyword, isstr, \ issubclassof, len2, _xcopy, _xdup, _zip from pygeodesy.errors import _AssertionError, _AttributeError, _incompatible, \ _IndexError, _IsnotError, itemsorted, LenError, \ _NameError, _NotImplementedError, _TypeError, \ _TypesError, _ValueError, UnitError, \ _xkwds, _xkwds_popitem from pygeodesy.interns import NN, _at_, _AT_, _COLON_, _COLONSPACE_, _COMMA_, \ _COMMASPACE_, _doesn_t_exist_, _DOT_, _DUNDER_, \ _EQUAL_, _EQUALSPACED_, _exists_, _immutable_, _name_, \ _NL_, _NN_, _not_, _other_, _s_, _SPACE_, _std_, \ _UNDER_, _valid_, _vs_, _dunder_nameof, _UNDER from pygeodesy.lazily import _ALL_DOCS, _ALL_LAZY, _caller3, _getenv from pygeodesy.props import _allPropertiesOf_n, deprecated_method, Property_RO, \ _hasProperty, property_doc_, property_RO, \ _update_all, _update_attrs from pygeodesy.streprs import attrs, Fmt, lrstrip, pairs, reprs, unstr __all__ = _ALL_LAZY.named __version__ = '22.10.30' _COMMANL_ = _COMMA_ + _NL_ _COMMASPACEDOT_ = _COMMASPACE_ + _DOT_ _del_ = 'del' _item_ = 'item' _MRO_ = 'MRO' # __DUNDER gets mangled in class _name = _UNDER(_name_) _Names_ = '_Names_' _registered_ = 'registered' # PYCHOK used! _std_NotImplemented = _getenv('PYGEODESY_NOTIMPLEMENTED', NN).lower() == _std_ _Units_ = '_Units_' def _xjoined_(prefix, name): '''(INTERNAL) Join C{pref} and non-empty C{name}. ''' return _SPACE_(prefix, repr(name)) if name and prefix else (prefix or name) def _xnamed(inst, name, force=False): '''(INTERNAL) Set the instance' C{.name = B{name}}. @arg inst: The instance (C{_Named}). @arg name: The name (C{str}). @kwarg force: Force name change (C{bool}). @return: The B{C{inst}}, named if B{C{force}}d or not named before. ''' if name and isinstance(inst, _Named): if not inst.name: inst.name = name elif force: inst.rename(name) return inst def _xother3(inst, other, name=_other_, up=1, **name_other): '''(INTERNAL) Get C{name} and C{up} for a named C{other}. ''' if name_other: # and not other and len(name_other) == 1 name, other = _xkwds_popitem(name_other) elif other and len(other) == 1: other = other[0] else: raise _AssertionError(name, other, txt=classname(inst, prefixed=True)) return other, name, up def _xotherError(inst, other, name=_other_, up=1): '''(INTERNAL) Return a C{_TypeError} for an incompatible, named C{other}. ''' n = _callname(name, classname(inst, prefixed=True), inst.name, up=up + 1) return _TypeError(name, other, txt=_incompatible(n)) def _xvalid(name, _OK=False): '''(INTERNAL) Check valid attribute name C{name}. ''' return True if (name and isstr(name) and name != _name_ and (_OK or not name.startswith(_UNDER_)) and (not iskeyword(name)) and isidentifier(name)) else False class _Dict(dict): '''(INTERNAL) An C{dict} with both key I{and} attribute access to the C{dict} items. ''' def __getattr__(self, name): '''Get an attribute or item by B{C{name}}. ''' try: return self[name] except KeyError: pass name = _DOT_(self.__class__.__name__, name) raise _AttributeError(item=name, txt=_doesn_t_exist_) def __repr__(self): '''Default C{repr(self)}. ''' return self.toRepr() def __str__(self): '''Default C{str(self)}. ''' return self.toStr() def set_(self, **items): # PYCHOK signature '''Add one or several new items or replace existing ones. @kwarg items: One or more C{name=value} pairs. ''' dict.update(self, items) def toRepr(self, **prec_fmt): # PYCHOK signature '''Like C{repr(dict)} but with C{name} prefix and with C{floats} formatted by function L{pygeodesy.fstr}. ''' n = self.get(_name_, classname(self)) return Fmt.PAREN(n, self._toT(_EQUAL_, **prec_fmt)) def toStr(self, **prec_fmt): # PYCHOK signature '''Like C{str(dict)} but with C{floats} formatted by function L{pygeodesy.fstr}. ''' return Fmt.CURLY(self._toT(_COLONSPACE_, **prec_fmt)) def _toT(self, sep, **kwds): '''(INTERNAL) Helper for C{.toRepr} and C{.toStr}, also in C{_NamedDict} below. ''' kwds = _xkwds(kwds, prec=6, fmt=Fmt.F, sep=sep) return _COMMASPACE_.join(pairs(itemsorted(self), **kwds)) class _Named(object): '''(INTERNAL) Root class for named objects. ''' _iteration = None # iteration number (C{int}) or C{None} _name = NN # name (C{str}) _classnaming = False # prefixed (C{bool}) # _updates = 0 # OBSOLETE Property/property updates def __imatmul__(self, other): # PYCHOK no cover '''Not implemented.''' return _NotImplemented(self, other) # PYCHOK Python 3.5+ def __matmul__(self, other): # PYCHOK no cover '''Not implemented.''' return _NotImplemented(self, other) # PYCHOK Python 3.5+ def __repr__(self): '''Default C{repr(self)}. ''' return Fmt.ANGLE(_SPACE_(self, _at_, hex(id(self)))) def __rmatmul__(self, other): # PYCHOK no cover '''Not implemented.''' return _NotImplemented(self, other) # PYCHOK Python 3.5+ def __str__(self): '''Default C{str(self)}. ''' return self.named2 def attrs(self, *names, **sep_COMMASPACE__Nones_True__pairs_kwds): '''Join named attributes as I{name=value} strings, with C{float}s formatted by function L{pygeodesy.fstr}. @arg names: The attribute names, all positional (C{str}). @kwarg sep_COMMASPACE__Nones_True__pairs_kwds: Keyword argument for function L{pygeodesy.pairs}, except C{B{sep}=", "} and C{B{Nones}=True} to in- or exclude missing or C{None}-valued attributes. @return: All C{name=value} pairs, joined by B{C{sep}} (C{str}). @see: Functions L{pygeodesy.attrs}, L{pygeodesy.fstr} and L{pygeodesy.pairs}. ''' def _sep_kwds(sep=_COMMASPACE_, **kwds): return sep, kwds sep, kwds = _sep_kwds(**sep_COMMASPACE__Nones_True__pairs_kwds) return sep.join(attrs(self, *names, **kwds)) @Property_RO def classname(self): '''Get this object's C{[module.]class} name (C{str}), see property C{.classnaming} and function C{classnaming}. ''' return classname(self, prefixed=self._classnaming) @property_doc_(''' the class naming (C{bool}).''') def classnaming(self): '''Get the class naming (C{bool}), see function C{classnaming}. ''' return self._classnaming @classnaming.setter # PYCHOK setter! def classnaming(self, prefixed): '''Set the class naming for C{[module.].class} names (C{bool}), to C{True} to include the module name. ''' b = bool(prefixed) if self._classnaming != b: self._classnaming = b _update_attrs(self, *_Named_Property_ROs) def classof(self, *args, **kwds): '''Create another instance of this very class. @arg args: Optional, positional arguments. @kwarg kwds: Optional, keyword arguments. @return: New instance (B{self.__class__}). ''' return _xnamed(self.__class__(*args, **kwds), self.name) def copy(self, deep=False, name=NN): '''Make a shallow or deep copy of this instance. @kwarg deep: If C{True} make a deep, otherwise a shallow copy (C{bool}). @kwarg name: Optional, non-empty name (C{str}). @return: The copy (C{This class} or sub-class thereof). ''' c = _xcopy(self, deep=deep) if name: c.rename(name) return c def _DOT_(self, *names): '''(INTERNAL) Period-join C{self.name} and C{names}. ''' return _DOT_(self.name, *names) def dup(self, name=NN, **items): '''Duplicate this instance, replacing some items. @kwarg name: Optional, non-empty name (C{str}). @kwarg items: Attributes to be changed (C{any}). @return: The duplicate (C{This class} or sub-class thereof). @raise AttributeError: Some B{C{items}} invalid. ''' d = _xdup(self, **items) if name: d.rename(name=name) return d def _instr(self, name, prec, *attrs, **props_kwds): '''(INTERNAL) Format, used by C{Conic}, C{Ellipsoid}, C{Transform}, C{Triaxial}. ''' def _props_kwds(props=(), **kwds): return props, kwds t = Fmt.EQUAL(_name_, repr(name or self.name)), if attrs: t += pairs(((a, getattr(self, a)) for a in attrs), prec=prec, ints=True) props, kwds =_props_kwds(**props_kwds) if props: t += pairs(((p.name, getattr(self, p.name)) for p in props), prec=prec, ints=True) if kwds: t += pairs(kwds, prec=prec) return _COMMASPACE_.join(t[1:] if name is None else t) @property_RO def iteration(self): # see .karney.GDict '''Get the most recent iteration number (C{int}) or C{None} if not available or not applicable. @note: The interation number may be an aggregate number over several, nested functions. ''' return self._iteration def methodname(self, which): '''Get a method C{[module.]class.method} name of this object (C{str}). @arg which: The method (C{callable}). ''' return _DOT_(self.classname, which.__name__ if callable(which) else _NN_) @property_doc_(''' the name (C{str}).''') def name(self): '''Get the name (C{str}). ''' return self._name @name.setter # PYCHOK setter! def name(self, name): '''Set the name (C{str}). @raise NameError: Can't rename, use method L{rename}. ''' m, n = self._name, str(name) if not m: self._name = n elif n != m: n = repr(n) c = self.classname t = _DOT_(c, Fmt.PAREN(self.rename.__name__, n)) m = Fmt.PAREN(_SPACE_('was', repr(m))) n = _DOT_(c, _EQUALSPACED_(_name_, n)) n = _SPACE_(n, m) raise _NameError(_SPACE_('use', t), txt=_not_(n)) # to set the name from a sub-class, use # self.name = name or # _Named.name.fset(self, name), but NOT # _Named(self).name = name @Property_RO def named(self): '''Get the name I{or} class name or C{""} (C{str}). ''' return self.name or self.classname @Property_RO def named2(self): '''Get the C{class} name I{and/or} the name or C{""} (C{str}). ''' return _xjoined_(self.classname, self.name) @Property_RO def named3(self): '''Get the I{prefixed} C{class} name I{and/or} the name or C{""} (C{str}). ''' return _xjoined_(classname(self, prefixed=True), self.name) @Property_RO def named4(self): '''Get the C{package.module.class} name I{and/or} the name or C{""} (C{str}). ''' return _xjoined_(_DOT_(self.__module__, self.__class__.__name__), self.name) def rename(self, name): '''Change the name. @arg name: The new name (C{str}). @return: The old name (C{str}). ''' m, n = self._name, str(name) if n != m: self._name = n _update_attrs(self, *_Named_Property_ROs) return m def toRepr(self, **unused): # PYCHOK no cover '''Default C{repr(self)}. ''' return repr(self) def toStr(self, **unused): # PYCHOK no cover '''Default C{str(self)}. ''' return str(self) @deprecated_method def toStr2(self, **kwds): # PYCHOK no cover '''DEPRECATED, use method C{toRepr}.''' return self.toRepr(**kwds) def _unstr(self, which, *args, **kwds): '''(INTERNAL) Return the string representation of a method invokation of this instance: C{str(self).method(...)} @see: Function L{pygeodesy.unstr}. ''' n = _DOT_(self, which.__name__ if callable(which) else _NN_) return unstr(n, *args, **kwds) def _xnamed(self, inst, name=NN, force=False): '''(INTERNAL) Set the instance' C{.name = self.name}. @arg inst: The instance (C{_Named}). @kwarg name: Optional name, overriding C{self.name} (C{str}). @kwarg force: Force name change (C{bool}). @return: The B{C{inst}}, named if not named before. ''' return _xnamed(inst, name or self.name, force=force) def _xrenamed(self, inst): '''(INTERNAL) Rename the instance' C{.name = self.name}. @arg inst: The instance (C{_Named}). @return: The B{C{inst}}, named if not named before. @raise TypeError: Not C{isinstance(B{inst}, _Named)}. ''' if not isinstance(inst, _Named): raise _IsnotError(_valid_, inst=inst) inst.rename(self.name) return inst _Named_Property_ROs = _allPropertiesOf_n(5, _Named, Property_RO) # PYCHOK once class _NamedBase(_Named): '''(INTERNAL) Base class with name. ''' def __repr__(self): '''Default C{repr(self)}. ''' return self.toRepr() def __str__(self): '''Default C{str(self)}. ''' return self.toStr() # def notImplemented(self, attr): # '''Raise error for a missing method, function or attribute. # # @arg attr: Attribute name (C{str}). # # @raise NotImplementedError: No such attribute. # ''' # c = self.__class__.__name__ # return NotImplementedError(_DOT_(c, attr)) def others(self, *other, **name_other_up): # see .points.LatLon_.others '''Refined class comparison, invoked as C{.others(other=other)}, C{.others(name=other)} or C{.others(other, name='other')}. @arg other: The other instance (any C{type}). @kwarg name_other_up: Overriding C{name=other} and C{up=1} keyword arguments. @return: The B{C{other}} iff compatible with this instance's C{class} or C{type}. @raise TypeError: Mismatch of the B{C{other}} and this instance's C{class} or C{type}. ''' if other: # most common, just one arg B{C{other}} other0 = other[0] if isinstance(other0, self.__class__) or \ isinstance(self, other0.__class__): return other0 other, name, up = _xother3(self, other, **name_other_up) if isinstance(self, other.__class__) or \ isinstance(other, self.__class__): return _xnamed(other, name) raise _xotherError(self, other, name=name, up=up + 1) def toRepr(self, **kwds): # PYCHOK expected '''(INTERNAL) I{Could be overloaded}. @kwarg kwds: Optional, C{toStr} keyword arguments. @return: C{toStr}() with keyword arguments (as C{str}). ''' t = lrstrip(self.toStr(**kwds)) # if self.name: # t = NN(Fmt.EQUAL(name=repr(self.name)), sep, t) return Fmt.PAREN(self.classname, t) # XXX (self.named, t) # def toRepr(self, **kwds) # if kwds: # s = NN.join(reprs((self,), **kwds)) # else: # super().__repr__ only for Python 3+ # s = super(self.__class__, self).__repr__() # return Fmt.PAREN(self.named, s) # clips(s) def toStr(self, **kwds): # PYCHOK no cover '''(INTERNAL) I{Must be overloaded}, see function C{notOverloaded}. ''' notOverloaded(self, **kwds) # def toStr(self, **kwds): # if kwds: # s = NN.join(strs((self,), **kwds)) # else: # super().__str__ only for Python 3+ # s = super(self.__class__, self).__str__() # return s def _update(self, updated, *attrs, **setters): '''(INTERNAL) Zap cached instance attributes and overwrite C{__dict__} or L{Property_RO} values. ''' u = _update_all(self, *attrs) if updated else 0 if setters: d = self.__dict__ # double-check that setters are Property_RO's for n, v in setters.items(): if n in d or _hasProperty(self, n, Property_RO): d[n] = v else: raise _AssertionError(n, v, txt=repr(self)) u += len(setters) return u class _NamedDict(_Dict, _Named): '''(INTERNAL) Named C{dict} with key I{and} attribute access to the items. ''' def __init__(self, *args, **kwds): if args: # args override kwds if len(args) != 1: t = unstr(self.classname, *args, **kwds) # PYCHOK no cover raise _ValueError(args=len(args), txt=t) kwds = _xkwds(dict(args[0]), **kwds) if _name_ in kwds: _Named.name.fset(self, kwds.pop(_name_)) # see _Named.name _Dict.__init__(self, kwds) def __delattr__(self, name): '''Delete an attribute or item by B{C{name}}. ''' if name in _Dict.keys(self): _Dict.pop(name) elif name in (_name_, _name): # _Dict.__setattr__(self, name, NN) _Named.rename(self, NN) else: _Dict.__delattr__(self, name) def __getattr__(self, name): '''Get an attribute or item by B{C{name}}. ''' try: return self[name] except KeyError: if name == _name_: return _Named.name.fget(self) raise _AttributeError(item=self._DOT_(name), txt=_doesn_t_exist_) def __getitem__(self, key): '''Get the value of an item by B{C{key}}. ''' if key == _name_: raise KeyError(Fmt.SQUARE(self.classname, key)) return _Dict.__getitem__(self, key) def __setattr__(self, name, value): '''Set attribute or item B{C{name}} to B{C{value}}. ''' if name in _Dict.keys(self): _Dict.__setitem__(self, name, value) # self[name] = value else: _Dict.__setattr__(self, name, value) def __setitem__(self, key, value): '''Set item B{C{key}} to B{C{value}}. ''' if key == _name_: raise KeyError(_EQUAL_(Fmt.SQUARE(self.classname, key), repr(value))) _Dict.__setitem__(self, key, value) def toRepr(self, **prec_fmt): # PYCHOK signature '''Like C{repr(dict)} but with C{name} prefix and with C{floats} formatted by function L{pygeodesy.fstr}. ''' return Fmt.PAREN(self.name, self._toT(_EQUAL_, **prec_fmt)) def toStr(self, **prec_fmt): # PYCHOK signature '''Like C{str(dict)} but with C{floats} formatted by function L{pygeodesy.fstr}. ''' return Fmt.CURLY(self._toT(_COLONSPACE_, **prec_fmt)) class _NamedEnum(_NamedDict): '''(INTERNAL) Enum-like C{_NamedDict} with attribute access restricted to valid keys. ''' _item_Classes = () def __init__(self, Class, *Classes, **name): '''New C{_NamedEnum}. @arg Class: Initial class or type acceptable as items values (C{type}). @arg Classes: Additional, acceptable classes or C{type}s. ''' self._item_Classes = (Class,) + Classes n = name.get(_name_, NN) or NN(Class.__name__, _s_) if n and _xvalid(n, _OK=True): _Named.name.fset(self, n) # see _Named.name def __getattr__(self, name): '''Get the value of an attribute or item by B{C{name}}. ''' try: return self[name] except KeyError: if name == _name_: return _NamedDict.name.fget(self) raise _AttributeError(item=self._DOT_(name), txt=_doesn_t_exist_) def __repr__(self): '''Default C{repr(self)}. ''' return self.toRepr() def __str__(self): '''Default C{str(self)}. ''' return self.toStr() def _assert(self, **kwds): '''(INTERNAL) Check attribute name against given, registered name. ''' for n, v in kwds.items(): if isinstance(v, _LazyNamedEnumItem): # property assert n is v.name # assert not hasattr(self.__class__, n) setattr(self.__class__, n, v) elif isinstance(v, self._item_Classes): # PYCHOK no cover assert self[n] is v and getattr(self, n) \ and self.find(v) == n else: raise _TypeError(v, name=n) def find(self, item, dflt=None): '''Find a registered item. @arg item: The item to look for (any C{type}). @kwarg dflt: Value to return if not found (any C{type}). @return: The B{C{item}}'s name if found (C{str}), or C{{dflt}} if there is no such I{registered} B{C{item}}. ''' for k, v in _Dict.items(self): # XXX not self.items() if v is item: return k return dflt def get(self, name, dflt=None): '''Get the value of a I{registered} item. @arg name: The name of the item (C{str}). @kwarg dflt: Value to return (any C{type}). @return: The item with B{C{name}} if found, or B{C{dflt}} if there is no item I{registered} with that B{C{name}}. ''' # getattr needed to instantiate L{_LazyNamedEnumItem} return getattr(self, name, dflt) def items(self, all=False, asorted=False): '''Yield all or only the I{registered} items. @kwarg all: Use C{True} to yield {all} items or C{False} for only the currently I{registered} ones. @kwarg asorted: If C{True}, yield the items sorted in I{alphabetical, case-insensitive} order. ''' if all: # instantiate any remaining L{_LazyNamedEnumItem} ... # ... and remove the L{_LazyNamedEnumItem} from the class for n in tuple(n for n, p in self.__class__.__dict__.items() if isinstance(p, _LazyNamedEnumItem)): _ = getattr(self, n) return itemsorted(_Dict, self) if asorted else _Dict.items(self) def keys(self, **all_asorted): '''Yield the keys (C{str}) of all or only the I{registered} items, optionally sorted I{alphabetically} and I{case-insensitively}. @kwarg all_asorted: See method C{items}.. ''' for k, _ in self.items(**all_asorted): yield k def popitem(self): '''Remove I{an, any} curretly I{registed} item. @return: The removed item. ''' return self._zapitem(*_Dict.pop(self)) def register(self, item): '''Registed a new item. @arg item: The item (any C{type}). @return: The item name (C{str}). @raise NameError: An B{C{item}} already registered with that name or the B{C{item}} has no, an empty or an invalid name. @raise TypeError: The B{C{item}} type invalid. ''' try: n = item.name if not (n and isstr(n) and isidentifier(n)): raise ValueError except (AttributeError, ValueError, TypeError) as x: raise _NameError(_DOT_(_item_, _name_), item, cause=x) if n in self: raise _NameError(self._DOT_(n), item, txt=_exists_) if not (self._item_Classes and isinstance(item, self._item_Classes)): raise _TypesError(self._DOT_(n), item, *self._item_Classes) self[n] = item def unregister(self, name_or_item): '''Remove a I{registered} item. @arg name_or_item: Name (C{str}) or the item (any C{type}). @return: The unregistered item. @raise NameError: No item with that B{C{name}}. @raise ValueError: No such item. ''' if isstr(name_or_item): name = name_or_item else: name = self.find(name_or_item) try: item = _Dict.pop(self, name) except KeyError: raise _NameError(item=self._DOT_(name), txt=_doesn_t_exist_) return self._zapitem(name, item) pop = unregister def toRepr(self, prec=6, fmt=Fmt.F, sep=_COMMANL_, **all_asorted): # PYCHOK _NamedDict '''Like C{repr(dict)} but C{name}s optionally sorted and C{floats} formatted by function L{pygeodesy.fstr}. ''' t = ((self._DOT_(n), v) for n, v in self.items(**all_asorted)) return sep.join(pairs(t, prec=prec, fmt=fmt, sep=_COLONSPACE_)) def toStr(self, *unused, **all_asorted): # PYCHOK _NamedDict '''Return a string with all C{name}s, optionally sorted. ''' return self._DOT_(_COMMASPACEDOT_.join(self.keys(**all_asorted))) def values(self, **all_asorted): '''Yield the value (C{type}) of all or only the I{registered} items, optionally sorted I{alphabetically} and I{case-insensitively}. @kwarg all_asorted: See method C{items}. ''' for _, v in self.items(**all_asorted): yield v def _zapitem(self, name, item): # remove _LazyNamedEnumItem property value if still present if self.__dict__.get(name, None) is item: self.__dict__.pop(name) # [name] = None item._enum = None return item class _LazyNamedEnumItem(property_RO): # XXX or descriptor? '''(INTERNAL) Lazily instantiated L{_NamedEnumItem}. ''' pass def _lazyNamedEnumItem(name, *args, **kwds): '''(INTERNAL) L{_LazyNamedEnumItem} property-like factory. @see: Luciano Ramalho, "Fluent Python", page 636, O'Reilly, 2016, "Coding a Property Factory", especially Example 19-24. ''' def _fget(inst): # assert isinstance(inst, _NamedEnum) try: # get the item from the instance' __dict__ item = inst.__dict__[name] except KeyError: # instantiate an _NamedEnumItem, it self-registers item = inst._Lazy(*args, **_xkwds(kwds, name=name)) # assert inst[name] is item # MUST be registered # store the item in the instance' __dict__ inst.__dict__[name] = item # remove the property from the registry class, such that # (a) the property no longer overrides the instance' item # in inst.__dict__ and (b) _NamedEnum.items(all=True) only # sees un-instantiated ones to be instantiated p = getattr(inst.__class__, name, None) if isinstance(p, _LazyNamedEnumItem): delattr(inst.__class__, name) # assert isinstance(item, _NamedEnumItem) return item p = _LazyNamedEnumItem(_fget) p.name = name return p class _NamedEnumItem(_NamedBase): '''(INTERNAL) Base class for items in a C{_NamedEnum} registery. ''' _enum = None # def __ne__(self, other): # XXX fails for Lcc.conic = conic! # '''Compare this and an other item. # # @return: C{True} if different, C{False} otherwise. # ''' # return not self.__eq__(other) @property_doc_(''' the I{registered} name (C{str}).''') def name(self): '''Get the I{registered} name (C{str}). ''' return self._name @name.setter # PYCHOK setter! def name(self, name): '''Set the name, unless already registered (C{str}). ''' if self._enum: raise _NameError(str(name), self, txt=_registered_) # XXX _TypeError self._name = str(name) def _register(self, enum, name): '''(INTERNAL) Add this item as B{C{enum.name}}. @note: Don't register if name is empty or doesn't start with a letter. ''' if name and _xvalid(name, _OK=True): self.name = name if name[:1].isalpha(): # '_...' not registered enum.register(self) self._enum = enum def unregister(self): '''Remove this instance from its C{_NamedEnum} registry. @raise AssertionError: Mismatch of this and registered item. @raise NameError: This item is unregistered. ''' enum = self._enum if enum and self.name and self.name in enum: item = enum.unregister(self.name) if item is not self: t = _SPACE_(repr(item), _vs_, repr(self)) # PYCHOK no cover raise _AssertionError(t) class _NamedTuple(tuple, _Named): '''(INTERNAL) Base for named C{tuple}s with both index I{and} attribute name access to the items. @note: This class is similar to Python's C{namedtuple}, but statically defined, lighter and limited. ''' _Names_ = () # item names, non-identifier, no leading underscore '''Tuple specifying the C{name} of each C{Named-Tuple} item. @note: Specify at least 2 item names. ''' _Units_ = () # .units classes '''Tuple defining the C{units} of the value of each C{Named-Tuple} item. @note: The C{len(_Units_)} must match C{len(_Names_)}. ''' _validated = False # set to True I{per sub-class!} def __new__(cls, arg, *args, **iteration_name): '''New L{_NamedTuple} initialized with B{C{positional}} arguments. @arg arg: Tuple items (C{tuple}, C{list}, ...) or first tuple item of several more in other positional arguments. @arg args: Tuple items (C{any}), all positional arguments. @kwarg iteration_name: Only keyword arguments C{B{iteration}=None} and C{B{name}=NN} are used, any other are I{silently} ignored. @raise LenError: Unequal number of positional arguments and number of item C{_Names_} or C{_Units_}. @raise TypeError: The C{_Names_} or C{_Units_} attribute is not a C{tuple} of at least 2 items. @raise ValueError: Item name is not a C{str} or valid C{identifier} or starts with C{underscore}. ''' n, args = len2(((arg,) + args) if args else arg) self = tuple.__new__(cls, args) if not self._validated: self._validate() N = len(self._Names_) if n != N: raise LenError(self.__class__, args=n, _Names_=N) if iteration_name: self._kwdself(**iteration_name) return self def __delattr__(self, name): '''Delete an attribute by B{C{name}}. @note: Items can not be deleted. ''' if name in self._Names_: raise _TypeError(_del_, _DOT_(self.classname, name), txt=_immutable_) elif name in (_name_, _name): _Named.__setattr__(self, name, NN) # XXX _Named.name.fset(self, NN) else: tuple.__delattr__(self, name) def __getattr__(self, name): '''Get the value of an attribute or item by B{C{name}}. ''' try: return tuple.__getitem__(self, self._Names_.index(name)) except IndexError: raise _IndexError(_DOT_(self.classname, Fmt.ANGLE(_name_)), name) except ValueError: # e.g. _iteration return tuple.__getattribute__(self, name) # def __getitem__(self, index): # index, slice, etc. # '''Get the item(s) at an B{C{index}} or slice. # ''' # return tuple.__getitem__(self, index) def __repr__(self): '''Default C{repr(self)}. ''' return self.toRepr() def __setattr__(self, name, value): '''Set attribute or item B{C{name}} to B{C{value}}. ''' if name in self._Names_: raise _TypeError(_DOT_(self.classname, name), value, txt=_immutable_) elif name in (_name_, _name): _Named.__setattr__(self, name, value) # XXX _Named.name.fset(self, value) else: # e.g. _iteration tuple.__setattr__(self, name, value) def __str__(self): '''Default C{repr(self)}. ''' return self.toStr() def dup(self, name=NN, **items): '''Duplicate this tuple replacing one or more items. @kwarg name: Optional new name (C{str}). @kwarg items: Items to be replaced (C{name=value} pairs), if any. @return: A copy of this tuple with B{C{items}}. @raise NameError: Some B{C{items}} invalid. ''' tl = list(self) if items: _ix = self._Names_.index try: for n, v in items.items(): tl[_ix(n)] = v except ValueError: # bad item name raise _NameError(_DOT_(self.classname, n), v, this=self) return self.classof(*tl, name=name or self.name) def items(self): '''Yield the items, each as a C{(name, value)} pair (C{2-tuple}). @see: Method C{.units}. ''' for n, v in _zip(self._Names_, self): # strict=True yield n, v iteritems = items def _kwdself(self, iteration=None, name=NN, **unused): '''(INTERNAL) Set C{__new__} keyword arguments. ''' if iteration is not None: self._iteration = iteration if name: self.name = name def toRepr(self, prec=6, sep=_COMMASPACE_, fmt=Fmt.F, **unused): # PYCHOK signature '''Return this C{Named-Tuple} items as C{name=value} string(s). @kwarg prec: The C{float} precision, number of decimal digits (0..9). Trailing zero decimals are stripped for B{C{prec}} values of 1 and above, but kept for negative B{C{prec}} values. @kwarg sep: Separator to join (C{str}). @kwarg fmt: Optional, C{float} format (C{str}). @return: Tuple items (C{str}). ''' t = pairs(self.items(), prec=prec, fmt=fmt) # if self.name: # t = (Fmt.EQUAL(name=repr(self.name)),) + t return Fmt.PAREN(self.named, sep.join(t)) # XXX (self.classname, sep.join(t)) def toStr(self, prec=6, sep=_COMMASPACE_, fmt=Fmt.F, **unused): # PYCHOK signature '''Return this C{Named-Tuple} items as string(s). @kwarg prec: The C{float} precision, number of decimal digits (0..9). Trailing zero decimals are stripped for B{C{prec}} values of 1 and above, but kept for negative B{C{prec}} values. @kwarg sep: Separator to join (C{str}). @kwarg fmt: Optional C{float} format (C{str}). @return: Tuple items (C{str}). ''' return Fmt.PAREN(sep.join(reprs(self, prec=prec, fmt=fmt))) def toUnits(self, Error=UnitError): # overloaded in .frechet, .hausdorff '''Return a copy of this C{Named-Tuple} with each item value wrapped as an instance of its L{units} class. @kwarg Error: Error to raise for L{units} issues (C{UnitError}). @return: A duplicate of this C{Named-Tuple} (C{C{Named-Tuple}}). @raise Error: Invalid C{Named-Tuple} item or L{units} class. ''' t = (v for _, v in self.units(Error=Error)) return self.classof(*tuple(t)) def units(self, Error=UnitError): '''Yield the items, each as a C{(name, value}) pair (C{2-tuple}) with the value wrapped as an instance of its L{units} class. @kwarg Error: Error to raise for L{units} issues (C{UnitError}). @raise Error: Invalid C{Named-Tuple} item or L{units} class. @see: Method C{.items}. ''' for n, v, U in _zip(self._Names_, self, self._Units_): # strict=True if not (v is None or U is None or (isclass(U) and isinstance(v, U) and hasattr(v, _name_) and v.name == n)): # PYCHOK indent v = U(v, name=n, Error=Error) yield n, v iterunits = units def _validate(self, _OK=False): # see .EcefMatrix '''(INTERNAL) One-time check of C{_Names_} and C{_Units_} for each C{_NamedUnit} I{sub-class separately}. ''' ns = self._Names_ if not (isinstance(ns, tuple) and len(ns) > 1): # XXX > 0 raise _TypeError(_DOT_(self.classname, _Names_), ns) for i, n in enumerate(ns): if not _xvalid(n, _OK=_OK): t = Fmt.SQUARE(_Names_=i) # PYCHOK no cover raise _ValueError(_DOT_(self.classname, t), n) us = self._Units_ if not isinstance(us, tuple): raise _TypeError(_DOT_(self.classname, _Units_), us) if len(us) != len(ns): raise LenError(self.__class__, _Units_=len(us), _Names_=len(ns)) for i, u in enumerate(us): if not (u is None or callable(u)): t = Fmt.SQUARE(_Units_=i) # PYCHOK no cover raise _TypeError(_DOT_(self.classname, t), u) self.__class__._validated = True def _xtend(self, xTuple, *items): '''(INTERNAL) Extend this C{Named-Tuple} with C{items} to an other B{C{xTuple}}. ''' if (issubclassof(xTuple, _NamedTuple) and (len(self._Names_) + len(items)) == len(xTuple._Names_) and self._Names_ == xTuple._Names_[:len(self)]): return self._xnamed(xTuple(self + items)) # *(self + items) c = NN(self.classname, repr(self._Names_)) # PYCHOK no cover x = NN(xTuple.__name__, repr(xTuple._Names_)) # PYCHOK no cover raise TypeError(_SPACE_(c, _vs_, x)) def callername(up=1, dflt=NN, source=False, underOK=False): '''Get the name of the invoking callable. @kwarg up: Number of call stack frames up (C{int}). @kwarg dflt: Default return value (C{any}). @kwarg source: Include source file name and line number (C{bool}). @kwarg underOK: Private, internal callables are OK (C{bool}). @return: The callable name (C{str}) or B{C{dflt}} if none found. ''' try: # see .lazily._caller3 for u in range(up, up + 32): n, f, s = _caller3(u) if n and (underOK or n.startswith(_DUNDER_) or not n.startswith(_UNDER_)): if source: n = NN(n, _AT_, f, _COLON_, str(s)) return n except (AttributeError, ValueError): pass return dflt def _callname(name, class_name, self_name, up=1): '''(INTERNAL) Assemble the name for an invokation. ''' n, c = class_name, callername(up=up + 1) if c: n = _DOT_(n, Fmt.PAREN(c, name)) if self_name: n = _SPACE_(n, repr(self_name)) return n def classname(inst, prefixed=None): '''Return the instance' class name optionally prefixed with the module name. @arg inst: The object (any C{type}). @kwarg prefixed: Include the module name (C{bool}), see function C{classnaming}. @return: The B{C{inst}}'s C{[module.]class} name (C{str}). ''' if prefixed is None: prefixed = getattr(inst, classnaming.__name__, prefixed) return modulename(inst.__class__, prefixed=prefixed) def classnaming(prefixed=None): '''Get/set the default class naming for C{[module.]class} names. @kwarg prefixed: Include the module name (C{bool}). @return: Previous class naming setting (C{bool}). ''' t = _Named._classnaming if prefixed in (True, False): _Named._classnaming = prefixed return t def modulename(clas, prefixed=None): # in .basics._xversion '''Return the class name optionally prefixed with the module name. @arg clas: The class (any C{class}). @kwarg prefixed: Include the module name (C{bool}), see function C{classnaming}. @return: The B{C{class}}'s C{[module.]class} name (C{str}). ''' try: n = clas.__name__ except AttributeError: n = '__name__' # _DUNDER_(NN, _name_, NN) if prefixed or (classnaming() if prefixed is None else False): try: m = clas.__module__.rsplit(_DOT_, 1) n = _DOT_.join(m[1:] + [n]) except AttributeError: pass return n def nameof(inst): '''Get the name of an instance. @arg inst: The object (any C{type}). @return: The instance' name (C{str}) or C{""}. ''' n = getattr(inst, _name_, NN) if not n: # and isinstance(inst, property): try: n = inst.fget.__name__ except AttributeError: n = NN return n def _notError(inst, name, args, kwds): # PYCHOK no cover '''(INTERNAL) Format an error message. ''' n = _DOT_(classname(inst, prefixed=True), _dunder_nameof(name, name)) m = _COMMASPACE_.join(modulename(c, prefixed=True) for c in inst.__class__.__mro__[1:-1]) return _COMMASPACE_(unstr(n, *args, **kwds), Fmt.PAREN(_MRO_, m)) def _NotImplemented(inst, *other, **kwds): '''(INTERNAL) Raise a C{__special__} error or return C{NotImplemented}, but only if env variable C{PYGEODESY_NOTIMPLEMENTED=std}. ''' if _std_NotImplemented: return NotImplemented n = _DOT_(classname(inst), callername(up=2, underOK=True)) # source=True raise _NotImplementedError(unstr(n, *other, **kwds), txt=repr(inst)) def notImplemented(inst, *args, **kwds): # PYCHOK no cover '''Raise a C{NotImplementedError} for a missing method or property. @arg inst: Instance (C{any}). @arg args: Method or property positional arguments (any C{type}s). @arg kwds: Method or property keyword arguments (any C{type}s). ''' n = kwds.pop(callername.__name__, NN) or callername(up=2) t = _notError(inst, n, args, kwds) raise _NotImplementedError(t, txt=notImplemented.__name__.replace('I', ' i')) def notOverloaded(inst, *args, **kwds): # PYCHOK no cover '''Raise an C{AssertionError} for a method or property not overloaded. @arg inst: Instance (C{any}). @arg args: Method or property positional arguments (any C{type}s). @arg kwds: Method or property keyword arguments (any C{type}s). ''' n = kwds.pop(callername.__name__, NN) or callername(up=2) t = _notError(inst, n, args, kwds) raise _AssertionError(t, txt=notOverloaded.__name__.replace('O', ' o')) def _Pass(arg, **unused): # PYCHOK no cover '''(INTERNAL) I{Pass-thru} class for C{_NamedTuple._Units_}. ''' return arg __all__ += _ALL_DOCS(_Named, _NamedBase, # _NamedDict, _NamedEnum, _NamedEnumItem, _NamedTuple) # **) MIT License # # Copyright (C) 2016-2022 -- mrJean1 at Gmail -- All Rights Reserved. # # Permission is hereby granted, free of charge, to any person obtaining a # copy of this software and associated documentation files (the "Software"), # to deal in the Software without restriction, including without limitation # the rights to use, copy, modify, merge, publish, distribute, sublicense, # and/or sell copies of the Software, and to permit persons to whom the # Software is furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included # in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR # OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, # ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR # OTHER DEALINGS IN THE SOFTWARE. # % env PYGEODESY_FOR_DOCS=1 python -m pygeodesy.named # all 71 locals OK